Quantum state control & manipulation - development of quantum computer hardware

Project funded by Swedish Research Council (Project grant), grant 2013-04038_VR. Participating organisations named by the source: Lund University. Funded amount: SEK 2,550,000, as stated by the source. Runs 2014-01-01 to 2016-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Atom- och molekylfysik och optik, Atom and Molecular Physics and Optics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-04); national funding data, not CORDIS. Abstract given by the source: We develop quantum computer and quantum memory hardware based on rare-earth-ion doped crystals. We develop methods and techniques for creating and controlling superposition and entangled states, for characterising and eliminating decoherence processes for increasingly complex quantum mechanical systems. High fidelity arbitrary single-qubit operations and qubit-qubit interactions for qubits that consist of millions of ions and high efficiency quantum state storage and recall of a single photon in billions of ions have been demonstrated. To be able to scale our quantum computing systems to several qubits we have developed a scheme in these randomly doped crystals where each qubit is a single ion. A key objective in the proposal is to be able to carry out state selective detection of the qubit (hyperfine) state of a single ion in the crystal. For us a typical experiment involves of the order of 1000 optical pulses and our highly stabilised laser system accurately control the wave function of the ions. When we simulate the action of our excitation sequences for our quantum memory or our qubit operations, data and experiment agree very well, demonstrating high control over the operations and quantum systems. The experiments in front of us are highly challenging and at the same time technically and scientifically inspiring. Many students approach us for diploma works and the projects do constitute an excellent educational environment for graduate students and postdocs.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-22. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project, funded by the Swedish Research Council with SEK 2,550,000, focuses on developing quantum computer hardware using rare-earth-ion doped crystals from 2014 to 2016. It aims to create and control quantum states and improve qubit operations and quantum state storage. Suggested technology pillar: computing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.